| Inertial navigation system is an autonomous navigation system which neither relieson external information nor radiates energy. Inertial navigation system is the mostnecessary electronic equipment for both weapon systems and navigation of aircraft andship, which is also widely used in civilian fields such as geodesy measurement at thesame time. The complexity and diversity of the inertial navigation software areincreasing with inertial technology and system complexity continuously developing. Atthe same time, Dependent on import of core CPUs, the instability of sources and the fastReplacement lead to types of hardware platform getting increasingly more and theamount of software duplication development increasing.Firstly, this thesis generally introduces related principles and methods aboutembedded software development based on VxWorks, inertial navigation system andinitial alignment of inertial navigation system. This thesis analyzes and summarizes thestatus of the airborne inertial navigation system software development, researchesexisting airborne inertial navigation system software and provides useful experience forthe development of new system. Secondly, this thesis focuses on the software designand implementation for the alignment module of an airborne inertial navigation system,analyzes the specific requirement of an airborne inertial navigation system and itsalignment module. Further, this thesis clears the development targets, which consists ofoverall requirement analysis of the inertial navigation system, requirement analysis andoutline design of the alignment module and detailed design of the alignment modulefrom four sub-modules such as platform start, platform back to zero, coarse alignmentand fine alignment.Finally, this thesis conducts semi-physical simulation and integrated avionicssystem test verification, which indicates the good coordination among the sub-moduleof the alignment module. This meets the design requirements of the subject. |
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